PRACTICE: Dalton's Law of Partial Pressure

Front

What is Dalton's Law of Partial Pressure?

Back

Dalton's Law states that in a mixture of non-reacting gases, the total pressure exerted is equal to the sum of the partial pressures of each individual gas.

Front

Define 'partial pressure'.

Back

Partial pressure is the pressure that a single gas in a mixture would exert if it occupied the entire volume alone.

Front

If the total pressure of a gas mixture is 760 mmHg and the partial pressure of oxygen is 160 mmHg, what is the partial pressure of the other gases?

Back

The partial pressure of the other gases is 600 mmHg (760 mmHg - 160 mmHg).

Front

How do you calculate the partial pressure of a gas in a mixture?

Back

The partial pressure can be calculated using the formula: P_partial = (X_gas) * (P_total), where X_gas is the mole fraction of the gas.

Front

What is the relationship between the number of moles of gas and its partial pressure?

Back

The partial pressure of a gas is directly proportional to the number of moles of that gas in a mixture, assuming constant temperature and volume.

Front

What is the total pressure of a gas mixture if the partial pressures of gas A, B, and C are 200 mmHg, 300 mmHg, and 250 mmHg respectively?

Back

The total pressure is 750 mmHg (200 mmHg + 300 mmHg + 250 mmHg).

Front

In a container with 4 moles of CO2 and 1 mole of O2, what is the mole fraction of CO2?

Back

The mole fraction of CO2 is 0.8 (4 moles CO2 / (4 moles CO2 + 1 mole O2)).

Front

What is the effect of temperature on gas pressure according to Dalton's Law?

Back

According to Dalton's Law, temperature affects the kinetic energy of gas molecules, which in turn affects the pressure; higher temperatures generally increase pressure.

Front

If the total pressure of a gas mixture is 500 mmHg and the partial pressure of nitrogen is 200 mmHg, what is the partial pressure of the remaining gases?

Back

The partial pressure of the remaining gases is 300 mmHg (500 mmHg - 200 mmHg).

Front

What is the partial pressure of water vapor at 25°C?

Back

The partial pressure of water vapor at 25°C is approximately 23.78 mmHg.